Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4023642.

this is a section of a larger universal hanger. i could no longer find these so i made some copies of the piece i had. it is used on the inside of windows to hang items such as lights. i used both PLA and PETG to print with same results. in the photo is the original, white PLA, and black PETG. No supports needed because it prints flat to bed. i used .2 layer